I'm new to Ubuntu, so any help will be appreciated.
When editing a file in Gedit, I can't save it to a different file name. Keying Ctrl-Shift-S causes the window to be greyed out. Same thing if I click the three-bar menu to the right of the word Save. Clicking the Save button seems to save the file with the same name.
Also the same thing happens if I try to save from a website page in Firefox. Right-click on anything (link, image, etc.) and choose Save As causes the Firefox window to be greyed out.